Directions apply liberally 15 minutes before sun exposure reapply: after 80 minutes of swimming or sweating Immediately after towel drying "at least every 2 hours Sun Protection Measures. Spending time in the sun increases your risk of skin cancer and early skin aging. To decrease this risk, regularly use a sunscreen with a broad spectrum SPF value of 15 or higher and other sun protection measures including: " limit time in the sun,especially from 10 a.m.-2 p.m.·wear long-sleeved shirts, pants,hats, and sunglasses children under 6 months: Ask a doctor.